ES2201682T3 - PRINTED VALUE DOCUMENT, WITH A LUMINISCENT CHARACTERISTICS OF AUTHENTICITY IN THE FORM OF A MAIN RETICLE. - Google Patents

PRINTED VALUE DOCUMENT, WITH A LUMINISCENT CHARACTERISTICS OF AUTHENTICITY IN THE FORM OF A MAIN RETICLE.

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Publication number
ES2201682T3
ES2201682T3 ES99910166T ES99910166T ES2201682T3 ES 2201682 T3 ES2201682 T3 ES 2201682T3 ES 99910166 T ES99910166 T ES 99910166T ES 99910166 T ES99910166 T ES 99910166T ES 2201682 T3 ES2201682 T3 ES 2201682T3
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Spain
Prior art keywords
value document
printed
luminescent substance
rare earth
condition
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Expired - Lifetime
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ES99910166T
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Spanish (es)
Inventor
Wittich Kaule
Gerhard Schwenk
Gerhard Stenzel
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Giesecke and Devrient GmbH
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Giesecke and Devrient GmbH
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7708—Vanadates; Chromates; Molybdates; Tungstates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7776—Vanadates; Chromates; Molybdates; Tungstates
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06046—Constructional details
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/901—Concealed data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/904—Credit card
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/916—Fraud or tamper detecting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Finance (AREA)
  • Accounting & Taxation (AREA)
  • Theoretical Computer Science (AREA)
  • Luminescent Compositions (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Printing Methods (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Graft Or Block Polymers (AREA)
  • Burglar Alarm Systems (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

The invention concerns a printed valuable document with at least one authentication feature in the form of a luminescent substance based on a host lattice doped with at least one rare earth metal. The host lattice largely absorbs in the entire visible region of the spectrum, is excitable in large parts of the visible region of the spectrum and at least partially transparent in at least the wavelength range between 0.8 mum and 1.1 mum. In addition, the host lattice contains chromium as an absorptive substance in such a concentration that amplification of the emission by the luminescent substance takes place. The rare earth metal emits in the wavelength region between 0.8 mum and 1.1 mum.

Description

Documento de valor impreso, con una característica luminiscente de autenticidad en forma de retícula principal.Printed value document, with a luminescent feature of grid-shaped authenticity principal.

La presente invención se refiere a un documento de valor impreso que tiene, como mínimo, una característica de autenticidad en forma de una substancia luminiscente con una retícula principal contaminada o dopada con, como mínimo, un metal de tierras raras.The present invention relates to a document of printed value that has at least one characteristic of authenticity in the form of a luminescent substance with a main grid contaminated or doped with at least one metal of rare earths.

La protección de documentos de valor mediante substancias luminiscentes se conoce desde hace largo tiempo. La utilización de metales de tierras raras se ha explicado también en relación con ello. Tienen la ventaja de poseer líneas de emisión de banda estrecha en la región espectral de infrarrojos que son particularmente características y que por lo tanto se pueden distinguir bien por tecnología de medición, a partir de líneas de emisión de otras substancias. Estas substancias luminiscentes en base a metales de tierras raras comportan usualmente retículas principales contaminadas o dopadas con un metal de tierras raras. Para detectar esta substancia luminiscente, se expone a una fuente de luz cuyo espectro de emisión se solapa ampliamente cuando el espectro de excitación del metal de tierras raras y la emisión inducida de este modo de la substancia luminiscente es selectivamente detectada.The protection of valuable documents through Luminescent substances has been known for a long time. The use of rare earth metals has also been explained in relationship with it. They have the advantage of owning emission lines of narrow band in the infrared spectral region that are particularly characteristic and therefore can be distinguish well by measurement technology, from lines of emission of other substances. These luminescent substances in Rare earth metal base usually involves reticles main contaminated or doped with a rare earth metal. To detect this luminescent substance, it is exposed to a source of light whose emission spectrum overlaps widely when the excitation spectrum of rare earth metal and emission induced in this way the luminescent substance is selectively detected.

Para incrementar la intensidad de emisión de la substancia luminiscente, también se ha sugerido la utilización de materiales luminosos coactivados. Estos contienen los dos metales de tierras raras neodimio (Nd) y iterbio (Yb) como activadores. En este caso, el Nd es excitado selectivamente en la región de 800 nm por medio de un diodo GaAs, y transfiere la energía absorbida con alto rendimiento al Yb, induciendo de esta manera emisión del Yb.To increase the emission intensity of the luminescent substance, the use of coactivated light materials. These contain the two metals of Rare earth neodymium (Nd) and ytterbium (Yb) as activators. In this case, the Nd is selectively excited in the 800 nm region by medium of a GaAs diode, and transfers the absorbed energy with high Yb yield, thereby inducing Yb emission.

La invención se basa en el problema de conseguir un documento de valor con una substancia luminiscente basada en retículas principales contaminadas con metales de tierras raras que es excitable en la región espectral visible y que tiene elevada intensidad de emisión en la zona espectral próxima IR.The invention is based on the problem of getting a valuable document with a luminescent substance based on main grids contaminated with rare earth metals that it is excitable in the visible spectral region and it has high emission intensity in the near IR spectral zone.

La solución a este problema resulta de las características de las reivindicaciones independientes. Otros desarrollos son materia de las reivindicaciones dependientes.The solution to this problem results from characteristics of the independent claims. Others developments are subject of the dependent claims.

La invención se basa en el concepto principal de que la intensidad de emisión se puede incrementar si la propia retícula principal tiene componentes absorbentes que absorben en una banda amplia y transfieren esta energía con alto rendimiento a los metales de tierras raras luminiscentes. Las retículas utilizadas son preferentemente retículas que absorben en la totalidad de la región espectral visible, por una parte, pero que por otra parte son ampliamente transparentes en la región próxima IR. Esto tiene la ventaja de que se pueden utilizar para la excitación de las substancias luminiscentes fuentes de iluminación potentes tales como, halógeno, xenón, arco o lámparas de destellos ("flash"). Al mismo tiempo, la retícula principal u hospedante debe ser ópticamente transparente en la zona de la banda de emisión de la substancia luminiscente. De acuerdo con la invención, esta región se encuentra en las proximidades de los infrarrojos entre 0,8 micras y 1,1 micras, de manera que existe una "ventana" no absorbente relativamente amplia en la que se pueden implementar gran variedad de espectros de emisión.The invention is based on the main concept of that the emission intensity can be increased if the main lattice has absorbent components that absorb in a broad band and transfer this energy with high performance to rare earth luminescent metals. The reticles used are preferably reticles that absorb throughout the region spectral visible, on the one hand, but on the other hand they are Widely transparent in the near IR region. This has the advantage that they can be used for the excitation of luminescent substances powerful lighting sources such such as halogen, xenon, arc or flash lamps. At the same time, the main or host grid must be optically transparent in the area of the emission band of the luminescent substance. According to the invention, this region is found in the vicinity of the infrared between 0.8 microns and 1.1 microns, so there is a non-absorbent "window" relatively wide in which great variety can be implemented of emission spectra.

La retícula principal de la invención contiene cromo como componente de absorción. Los metales de tierras raras utilizadas en este caso pueden ser iterbio, praseodimio o neodimio. La retícula principal puede traer también varias contaminaciones de metales de tierras raras.The main grid of the invention contains Chromium as absorption component. Rare earth metals used in this case can be ytterbium, praseodymium or neodymium. The main reticle can also bring various contamination of rare earth metals.

Preferentemente, la retícula principal tiene una estructura de granate o de perovsquita.Preferably, the main grid has a Garnet or perovsquita structure.

Los componentes de la retícula principal absorbente pueden ser substituidos parcialmente por aluminio no absorbente. La proporción de aluminio puede ser utilizada para controlar la absorción y por lo tanto el brillo de la substancia luminiscente. Las substancias luminiscentes de este tipo pueden por lo tanto ser utilizadas como aditivos para cintas de impresión más claras.The main grid components absorbent can be partially replaced by non aluminum absorbent. The proportion of aluminum can be used to control the absorption and therefore the brightness of the substance luminescent. Luminescent substances of this type can by therefore be used as additives for print tapes more clear.

Otras realizaciones y ventajas de la invención se explicarán a continuación con referencia a las figuras y ejemplos.Other embodiments and advantages of the invention are will explain below with reference to the figures and examples.

La figura 1 muestra el espectro de excitación de una substancia luminiscente objeto de la invención,Figure 1 shows the excitation spectrum of a luminescent substance object of the invention,

la figura 2 muestra espectros de algunas fuentes de luz,Figure 2 shows spectra from some sources of light,

la figura 3 muestra el espectro de emisión de una substancia luminiscente, según la invención, contaminada con Yb,Figure 3 shows the emission spectrum of a luminescent substance, according to the invention, contaminated with Yb,

la figura 4 muestra el espectro de emisión de una substancia luminiscente, según la invención, contaminada con Pr,Figure 4 shows the emission spectrum of a luminescent substance, according to the invention, contaminated with Pr,

la figura 5 muestra el espectro de emisión de una substancia luminiscente, según la invención, contaminada con Nd,Figure 5 shows the emission spectrum of a luminescent substance, according to the invention, contaminated with Nd,

la figura 6 muestra un elemento de seguridad, según la invención, en sección transversal.Figure 6 shows a security element, according to the invention, in cross section. 

       \newpage\ newpage

La figura 1 muestra el espectro de excitación de una substancia luminiscente según la invención. Esta substancia luminiscente consiste en una retícula principal u hospedante que contiene cromo contaminada con un metal de tierras raras, como mínimo. La retícula principal absorbe la casi totalidad de la región espectral de rango visible. Esta banda de absorción muy amplia por parte de la retícula principal provoca que las líneas que se encuentran en esta zona de los contaminantes en metales de tierras raras se supriman. Al mismo tiempo, tiene lugar en una transferencia de energía desde la retícula principal al metal contaminante de tierras raras, que induce emisión de la substancia luminiscente. Esto tiene como resultado una excitación mucho más eficaz de los metales de tierras raras en comparación con la banda estrecha, excitación selectiva de líneas de emisión individuales, lo cual lleva también a intensidades de emisión más elevadas.Figure 1 shows the excitation spectrum of a luminescent substance according to the invention. This substance luminescent consists of a main or host reticulum that Contains chromium contaminated with a rare earth metal, such as minimum. The main reticle absorbs almost the entire region Spectral of visible range. This very wide absorption band by part of the main reticle causes the lines to be found in this area of contaminants in earth metals Rare are suppressed. At the same time, it takes place in a transfer of energy from the main reticle to the contaminating metal of rare earths, which induces emission of the luminescent substance. This results in a much more effective excitation of the rare earth metals compared to the narrow band, selective excitation of individual emission lines, which It also leads to higher emission intensities.

La absorción de banda ancha de la retícula tiene además la ventaja de que las substancias luminiscentes pueden ser excitadas utilizando fuentes de luz intensas tales como lámparas de destellos ("flash"), que emiten radiaciones en toda la zona del espectro visible.The broadband absorption of the reticle has also the advantage that luminescent substances can be excited using intense light sources such as lamps flashes ("flash"), which emit radiation throughout the area of the visible spectrum

La figura 2 muestra el espectro de dicha lámpara flash con el numeral de referencia (1). El espectro 1 de la lámpara de destellos se ha mostrado extendida de forma continua desde la región UV a la región IR del espectro. En algunos casos, puede ser útil iluminar la substancia luminiscente solamente con luz en la parte visible del espectro. En este caso, es aconsejable efectuar la iluminación utilizando diodos emisores de luz de longitud de onda apropiada. Los diodos emisores de luz tienen en general un espectro de banda estrecha, de manera que son necesarios varios diodos emisores de luz para cubrir la totalidad del espectro visible. La figura 2 muestra los espectros (2), (3) y (4) de diodos de emisión de color verde, naranja y rojo, que se solapan, de manera que se cubre la totalidad del espectro visible.Figure 2 shows the spectrum of said lamp flash with the reference numeral (1). The spectrum 1 of the lamp of flashes has been extended continuously since the UV region to the IR region of the spectrum. In some cases, it can be useful to illuminate the luminescent substance only with light in the visible part of the spectrum. In this case, it is advisable to carry out the lighting using wavelength light emitting diodes appropriate. Light emitting diodes generally have a spectrum narrow band, so that several diodes are necessary light emitters to cover the entire visible spectrum. The Figure 2 shows the spectra (2), (3) and (4) of emission diodes green, orange and red, that overlap, so that It covers the entire visible spectrum.

Las figuras 3, 4 y 5 muestran los espectros de emisión de las substancias luminiscentes individuales de la invención.Figures 3, 4 and 5 show the spectra of emission of the individual luminescent substances of the invention.

La figura 3 muestra el espectro de emisión de una retícula principal contaminada con Pr. El espectro se extiende aproximadamente desde 0,9 micras a 1,08 micras. Tiene un número de picos de emisión muy característico, que puede ser evaluado muy bien como característica de autenticidad.Figure 3 shows the emission spectrum of a main grid contaminated with Pr. The spectrum extends approximately from 0.9 microns to 1.08 microns. It has a number of very characteristic emission peaks, which can be evaluated very well as a characteristic of authenticity.

La figura 4 muestra el espectro característico de una retícula principal contaminada con Nd. Este espectro tiene dos picos de emisión relativamente intensos en la zona de longitud de onda, desde aproximadamente 0,9 micras y justamente por debajo de 1,1 micras. Existe también un pico algo más pequeño en la región de 0,95 micras.Figure 4 shows the characteristic spectrum of a main grid contaminated with Nd. This spectrum has two relatively intense emission peaks in the area of length of wave, from about 0.9 microns and just below 1.1 microns There is also a somewhat smaller peak in the region of 0.95 microns

El espectro de una retícula principal contaminada con Yb mostrada en la figura 5, no obstante, es muy simétrico y muestra solamente un pico, cuya máxima se encuentra en una longitud de onda aproximada de 1 micra.The spectrum of a contaminated main lattice with Yb shown in figure 5, however, it is very symmetrical and shows only one peak, whose maximum is one length of approximately 1 micron wave.

Todas estas retículas de invención tienen en común que muestran una emisión de luminiscencia muy notable en las proximidades de los infrarrojos, es decir, en la zona comprendida 0,8 micras y 1,1 micras. Si bien todos los espectros de emisión corresponden a la misma región espectral, difieren tan claramente entre sí que se pueden diferenciar mediante técnicas de medición.All these invention grids have in common that show a very noticeable luminescence emission in the near infrared, that is, in the area covered 0.8 microns and 1.1 microns. While all emission spectra they correspond to the same spectral region, differ so clearly each other that can be differentiated by techniques of measurement.

Para asegurar la mayor eficacia posible de los metales de tierras raras, se utilizan retículas principales en el caso de una estructura de granate que tiene la fórmula generalTo ensure the highest possible efficiency of rare earth metals, main reticles are used in the case of a garnet structure that has the general formula

A_{3}Cr_{5-x}Al_{x}O_{12} A_ {3} Cr_ {5-x} Al_ {x} O_ {12}

en la que A significa un elemento seleccionado del grupo que consiste en escandio (Sc), itrio (Y), lantánidos y actínidos, y el índice x cumple la condición 0<x<5. Preferentemente, el índice se encuentra en una gama de 0,3 a 2,5.in which A means a selected item from the group consisting of scandium (Sc), yttrium (Y), lanthanides and actinides, and the index x meets the condition 0 <x <5. Preferably, the index is in a range of 0.3 to 2.5

Una realización preferente de la substancia luminiscente de la invención en una estructura granate esA preferred embodiment of the substance luminescent of the invention in a garnet structure is

Y_{3-z}Nd_{z}Cr_{5-x}Al_{x}O_{12}Y_ {3-z} Nd_ {z} Cr_ {5-x} Al_ {x} O_ {12}

en la que D significa neodimio, praseodimio o iterbio y el índice z cumple la condición 0<z<1.in which D means neodymium, praseodymium or iterbium and the z index meets the condition 0 <z <1.

Si la retícula principal se encuentra presente en una estructura de perovsquita, ésta se puede describir por la fórmula generalIf the main grid is present in a perovsquita structure, this can be described by the General Formula

ACrO_{3}ACrO 3

en la que A significa un elemento seleccionado del grupo que consiste en itrio, escandio y los lantánidos.in which A means a selected item of the group consisting of yttrium, scandium and lanthanides

Una realización preferente de la substancia luminiscente de la invención en una estructura de perovsquita se puede describir por la fórmulaA preferred embodiment of the substance luminescent of the invention in a perovsquita structure is can describe by the formula

Y_{1-z}D_{z}CrO_{3}Y_ {1-z} D_ {z} CrO 3

en la que D significa uno de los elementos neodimio, praseodimio e iterbio y el índice z cumple la condición 0<z<1.in which D means one of the elements neodymium, praseodymium and yerbium and the z index meets the condition 0 <z <1.

De acuerdo con otra realización, no obstante, las retículas principales específicas pueden ser también contaminadas con varios metales de tierras raras.According to another embodiment, however, the specific main reticles can also be contaminated with several rare earth metals.

A continuación, se explicarán de manera más detallada algunos ejemplos de la substancia luminiscente de la invención.Then they will be explained more detailed some examples of the luminescent substance of the invention.

Ejemplo 1Example 1 Preparación de un granate mixto de itrio-cromo-aluminio activado con iterbio/neodimio (Y_{2,75}Nd_{0,05}Yb_{0,2}Cr_{0,8}Al_{4,2}O_{12})Preparation of a mixed garnet of yttrium-chrome-aluminum activated with ytterbium / neodymium (Y_ {2.75} Nd_0.05 Yb_ {0.2} Cr_ {0.8} Al_ {4.2} O12}

49,04 g de óxido de itrio (Y_{2}O_{3}), 1,33 g de óxido de neodimio (Nd_{2}O_{3}), 6,22 g de óxido de iterbio (Yb_{2}O_{3}), 9,6 g de óxido de cromo (Cr_{2}O_{3}), 33,81 g de óxido de aluminio (Al_{2}O_{3}) y 100 g de sulfato sódico seco (Na_{2}SO_{4}) son mezclados íntimamente y calentados a 1100ºC durante 12 horas en un crisol de corindón.49.04 g of yttrium oxide (Y 2 O 3), 1.33 g of neodymium oxide (Nd2O3), 6.22 g of ytterbium oxide (Yb 2 O 3), 9.6 g of chromium oxide (Cr 2 O 3), 33.81 g of aluminum oxide (Al 2 O 3) and 100 g of sodium sulfate Dry (Na2SO4) are mixed intimately and heated to 1100 ° C for 12 hours in a corundum crucible.

Después de refrigeración, el producto de la reacción es molido, lavado con agua, reducido el producto secundario de cromato sódico con ácido sulfúrico/sulfato de hierro(II) a sulfato de cromo(III), y el producto es secado al aire a 100ºC. Para conseguir el tamaño de grano más fino posible, el material en polvo es molido a continuación en agua en un molino de bolas de agitación hasta conseguir un tamaño de granos promedio menor de 1 micra.After cooling, the product of the reaction is ground, washed with water, reduced by-product of sodium chromate with sulfuric acid / iron (II) sulfate a chromium sulfate (III), and the product is air dried to 100 ° C To get the finest grain size possible, the powder material is then ground in water in a mill stirring balls until you get an average grain size less than 1 micron.

Después de filtrado y secado, se consigue un material en polvo de color verde.After filtering and drying, a green powder material.

Ejemplo 2Example 2 Preparación de perovsquita de itrio-cromoactivada con iterbio (Y_{0,85}Yb_{0,15}CrO_{3})Preparation of perovsquita from yttrium-chroma-activated yttrium (Y_ {0.85} Yb_ {0.15} CrO 3)

47,62 g de óxido de itrio (Y_{2}O_{3}), 37,71 g de óxido de cromo (Cr_{2}O_{3}), 14,66 g de óxido de iterbio (Yb_{2}O_{3}) y 100 g y de sulfato sódico seco (Na_{2}SO_{4}) se mezclan íntimamente y se calientan en 1100ºC durante 20 horas en un crisol de corindón.47.62 g of yttrium oxide (Y 2 O 3), 37.71 g of chromium oxide (Cr 2 O 3), 14.66 g of ytterbium oxide (Yb 2 O 3) and 100 g and dry sodium sulfate (Na 2 SO 4) are mixed intimately and heated at 1100 ° C for 20 hours in a corundum crucible.

Después de enfriamiento, el producto de la reacción es movido, el flujo es lavado con agua, el producto secundario de cromato sódico reducido con ácido sulfúrico/sulfato de hierro(II) a sulfato de cromo(III), y el producto es secado en el aire a 100ºC. Para conseguir el tamaño de grano más fino posible, el material en polvo es molturado a continuación de manera correspondiente en agua con un molino de bolas.After cooling, the product of the reaction is moved, the flow is washed with water, the product Sodium Chromate Secondary Reduced with Sulfuric Acid / Sulfate iron (II) to chromium (III) sulfate, and the product is air dried at 100 ° C. To get the grain size more fine as possible, the powder material is milled after corresponding way in water with a ball mill.

Después de filtrado y secado, se consigue un material en polvo de color verde con un tamaño promedio de granos de menos de 1 micra.After filtering and drying, a green powder with an average grain size of less than 1 micron

Ejemplo 3Example 3 Preparación de un granate mixto de itrio-aluminio-cromo activado mediante neodimio (Y_{2,91}Nd_{0,09}Cr_{1,6}Al_{3,4}O_{12})Preparation of a mixed garnet of yttrium-aluminum-activated chromium by neodymium (Y_ {2.91} Nd_ {0.09} Cr_ {1.6} Al_ {3.4} O12}

51,45 g de óxido de itrio (Y_{2}O_{3}), 27,14 g de óxido de aluminio (A_{2}O_{3}), 19,04 g de óxido de cromo(III) (Cr_{2}O_{3}), 2,37 g de óxido de neodimio (Nd_{2}O_{3}) y 100 g sulfato sódico seco (Na_{2}SO_{4}) son mezclados íntimamente y calentados a 1100ºC durante 12 horas en un crisol de corindón.51.45 g yttrium oxide (Y 2 O 3), 27.14 g of aluminum oxide (A 2 O 3), 19.04 g of chromium (III) (Cr 2 O 3), 2.37 g of neodymium oxide (Nd 2 O 3) and 100 g dry sodium sulfate (Na 2 SO 4) are intimately mixed and heated at 1100 ° C for 12 hours in a corundum crucible.

Después de enfriamiento, el producto de reacción es movido, el flujo es lavado con agua, el producto secundario de cromato sódico es reducido con ácido sulfúrico/sulfato de hierro(II) a sulfato de cromo(III), el producto es filtrado y secado al aire a 100ºC. Para conseguir el grano más fino posible, el material en polvo es molido a continuación de forma correspondiente en agua en un molino de bolas de agitación.After cooling, the reaction product it is moved, the flow is washed with water, the secondary product of sodium chromate is reduced with sulfuric acid / sulfate iron (II) to chromium (III) sulfate, the product is filtered and air dried at 100 ° C. To get the finest grain possible, the powder material is then ground so corresponding in water in a stirring ball mill.

Después de filtrado y secado, se obtiene un material en polvo de color verde claro con un tamaño promedio de granos menor de 1 micra.After filtering and drying, a light green powder material with an average size of grains less than 1 micron.

Ejemplo 4Example 4 Preparación de granate mixto de itrio-aluminio-cromo activado con iterbio (Y_{2,7}Nd_{0,3}Cr_{1,8}Al_{3,2}O_{12})Preparation of mixed garnet from yttrium-aluminum-chrome activated with Ytterbium (Y_ {2,7} Nd_ {0,3} Cr_ {1,8} Al_ {3,2} O_ {12})

45,92 g de óxido de itrio (Y_{2}O_{3}), 24,57 g de óxido de aluminio (Al_{2}O_{3}), 20,61 g de óxido de cromo (III) (Cr_{2}O_{3}), 8,9 g de óxido de cromo(III) (Cr_{2}O_{3}), 8,9 g de óxido de iterbio (Yb_{2}O_{3}) y 100 g de sulfato sódico seco (Na_{2}SO_{4}) se mezclan íntimamente y se calientan a 1100ºC durante 12 horas en un crisol de corindón.45.92 g of yttrium oxide (Y 2 O 3), 24.57 g of aluminum oxide (Al 2 O 3), 20.61 g of chromium oxide (III) (Cr 2 O 3), 8.9 g of chromium oxide (III) (Cr 2 O 3), 8.9 g of ytterbium oxide (Yb 2 O 3) and 100 g of dry sodium sulfate (Na2SO4) are mixed intimately and They are heated at 1100 ° C for 12 hours in a corundum crucible.

Después de enfriamiento, el producto de la reacción es molido y el flujo es lavado con agua, el producto secundario de cromato sódico es reducido con ácido sulfúrico/sulfato de hierro(II) a sulfato de cromo (III), el producto es filtrado y secado al aire a 100ºC. Para conseguir el tamaño de grano más fino posible, el material en polvo es molido a continuación de forma correspondiente en agua en un molino de bolas de agitación.After cooling, the product of the reaction is ground and the flow is washed with water, the product Sodium chromate secondary is reduced with sulfuric acid / sulfate from iron (II) to chromium (III) sulfate, the product is filtered and air dried at 100 ° C. To get the grain size as fine as possible, the powder material is ground after corresponding form in water in a ball mill agitation.

Después de filtrado y secado, se obtiene un material en polvo de color verde con un tamaño de grano promedio menor de 1 micra.After filtering and drying, a green powder with an average grain size less than 1 micron.

Ejemplo 5Example 5 Preparación de un granate mixto de itrio-aluminio-cromo activado con praseodimio (Y_{2,9}Pr_{0,09}Cr_{2}Al_{3}O_{2})Preparation of a mixed garnet of yttrium-aluminum-chrome activated with praseodymium (Y_2,9 Pr_ {0,09} Cr_ {Al} {2} {2})

50,68 g de óxido de itrio (Y_{2}O_{3}), 23,59 g de óxido de aluminio (Al_{2}O_{3}) 23,45 g de óxido de cromo(III) (Cr_{2}O_{3}), 2,29 g de óxido de praseodimio (Pr_{2}O_{3}) y 100 g de sulfato sódico secante (Na_{2}SO_{4}) se mezclan íntimamente y se calientan a 1100ºC durante 12 horas en un crisol de corindón.50.68 g of yttrium oxide (Y 2 O 3), 23.59 g of aluminum oxide (Al 2 O 3) 23.45 g of chromium (III) (Cr 2 O 3), 2.29 g of praseodymium oxide (Pr 2 O 3) and 100 g of drying sodium sulfate (Na 2 SO 4) are mixed intimately and heated at 1100 ° C for 12 hours in a corundum crucible.

Después de enfriamiento, el producto de la reacción es molido, el flujo es lavado con agua, el producto secundario de cromato sódico es reducido con ácido sulfúrico/sulfato de hierro(II) a sulfato de cromo(III), y el producto es secado en el aire a 100ºC. Para conseguir el tamaño de grano más fino posible, el material en polvo es molido a continuación de manera correspondiente en agua con un molino de bolas de agitación.After cooling, the product of the reaction is ground, the flow is washed with water, the product Sodium chromate secondary is reduced with sulfuric acid / sulfate from iron (II) to chromium (III) sulfate, and the product It is air dried at 100 ° C. To get the grain size more fine as possible, the powder material is ground after corresponding way in water with a ball mill agitation.

Después de filtrado y secado, se consigue un material en polvo de color verde con tamaño de grano promedio menor de 1 micra.After filtering and drying, a green powder material with smaller average grain size 1 micron

La substancia luminiscente se puede incorporar en el documento de valor en una gran variedad de formas de acuerdo con la invención. Por ejemplo, la substancia luminiscente puede ser añadida a la tinta de impresión, que contiene adicionalmente aditivos de color visibles al ojo humano. No obstante, también es posible mezclar la substancia luminiscente en pulpa de papel. Las substancias luminiscentes pueden ser también dispuestas sobre un material de substrato de plástico o en el interior del mismo, que es, por ejemplo, por lo menos parcialmente embebido en una pulpa de papel. El material del substrato puede tener forma de un hilo de seguridad, hilo de moteado o plaquita.The luminescent substance can be incorporated into the value document in a variety of ways according to the invention. For example, the luminescent substance can be added to the printing ink, which additionally contains color additives visible to the human eye. However, it is also possible to mix the luminescent substance in paper pulp. The luminescent substances can also be arranged on a plastic substrate material or inside it, which it is, for example, at least partially embedded in a pulp of paper. The substrate material may be in the form of a thread of security, mottle thread or insert.

No obstante, el material del substrato de plástico o de papel puede también ser fijado a cualquier otro objeto, por ejemplo, como parte de las medidas de protección de un producto. El material del substrato adopta preferentemente la forma de una etiqueta en este caso. Si el material del substrato es parte del objeto que se desea proteger, tal como ocurre con hilos de apertura por rotura, también es posible desde luego cualquier otro diseño. En ciertas aplicaciones puede ser también útil disponer la substancia luminiscente como recubrimiento invisible sobre el documento de valor. Se puede encontrar en la totalidad del mismo, o en forma de ciertos dibujos, tales como bandas, líneas, círculos, o en forma de caracteres alfanuméricos.However, the substrate material of plastic or paper can also be attached to any other object, for example, as part of the protection measures of a product. The substrate material preferably takes the form of a label in this case. If the substrate material is part of the object to be protected, as with threads of breakage opening, of course any other is also possible design. In certain applications it may also be useful to arrange the luminescent substance as invisible coating on the value document It can be found in its entirety, or in the form of certain drawings, such as bands, lines, circles, or in the form of alphanumeric characters.

El término "documento de valor" se refiere, de acuerdo con la invención, a billetes de banco, cheques, acciones, fichas, documentos de identificación, tarjetas de crédito, pasaportes y otros documentos, así como etiquetas, sellos, embalajes u otros objetos para la protección del producto.The term "value document" refers to, according to the invention, to banknotes, checks, shares, tokens, identification documents, credit cards, passports and other documents, as well as labels, stamps, packaging or other objects for product protection.

La figura 6 muestra una realización de un elemento de seguridad según la invención. El elemento de seguridad consiste, en este caso, en la etiqueta (5) compuesta por una capa de papel de plástico (6), una capa de cubrición transparente (7) y una capa de adhesivo (8). La etiqueta (5) está conectada a cualquier substrato deseado (10) a través de la capa de adhesivo (8). El substrato (10) puede ser otro documento de valor, documento de identificación, pasaporte, certificado o similar, u otro objeto a proteger, tal como CD, embalaje o similar.Figure 6 shows an embodiment of a safety element according to the invention. Security element it consists, in this case, of the label (5) composed of a layer of plastic paper (6), a transparent covering layer (7) and a adhesive layer (8). The tag (5) is connected to any desired substrate (10) through the adhesive layer (8). The substrate (10) may be another document of value, document of identification, passport, certificate or similar, or other object to protect, such as CD, packaging or similar.

En este ejemplo, la substancia luminiscente (9) está contenida dentro del volumen de la capa (6). Si la capa (6) es una capa de papel, la concentración de la substancia luminiscente se encuentra entre 0,05 y 1 por ciento en peso.In this example, the luminescent substance (9) It is contained within the volume of the layer (6). If the layer (6) is a layer of paper, the concentration of the luminescent substance is It is between 0.05 and 1 percent by weight.

De manera alternativa, la substancia luminiscente puede estar contenida dentro de una tinta de impresión no mostrada, que se imprime sobre una de las capas de la etiqueta, preferentemente sobre la superficie de la capa (6). La concentración de substancia luminiscente en la tinta de impresión está comprendida en este caso de 10 a 40 por ciento en peso.Alternatively, the luminescent substance it may be contained within a printing ink not shown, which is printed on one of the label layers, preferably on the surface of the layer (6). Concentration of luminescent substance in the printing ink is comprised in this case 10 to 40 percent by weight.

En vez de disponer la substancia luminiscente en un material de substrato o sobre el mismo, que a continuación es fijado a un objeto como elemento de seguridad, también es posible de acuerdo con la presente invención disponer la substancia luminiscente directamente dentro del documento de valor a proteger o sobre su superficie en forma de recubrimiento.Instead of arranging the luminescent substance in a substrate material or on it, which is then fixed to an object as a security element, it is also possible to according to the present invention provide the substance luminescent directly within the value document to be protected or on its surface in the form of a coating.

Claims (27)

1. Documento de valor, impreso, que posee, como mínimo, una característica de autenticidad en forma de substancia luminiscente basada en una retícula principal contaminada con, como mínimo, un metal de tierras raras que absorbe substancialmente la región visible del espectro, es excitable en partes substanciales de la región visible del espectro y, como mínimo, parcialmente transparente, como mínimo, en una longitud de onda comprendida entre 0,8 y 1,1 micras, emitiendo el metal de tierras raras en una gama de longitud de onda entre 0,8 y 1,1 micras, y conteniendo la retícula principal cromo como substancia de absorción en una concentración tal que tiene lugar la amplificación de la emisión por la substancia luminiscente.1. Value document, printed, which has at least one authenticity characteristic in the form of a luminescent substance based on a main grid contaminated with at least one rare earth metal that substantially absorbs the visible region of the spectrum, is excitable in substantial parts of the visible region of the spectrum and, at least, partially transparent, at least, in a wavelength between 0.8 and 1.1 microns, emitting the rare earth metal in a wavelength range between 0.8 and 1.1 microns, and containing the main chromium lattice as an absorption substance in a concentration such that amplification of the emission by the luminescent substance takes place. 2. Documento de valor, impreso, según la reivindicación 1, caracterizado porque el metal de tierras raras es iterbio, praseodimio o neodimio.2. Value document, printed according to claim 1, characterized in that the rare earth metal is ytterbium, praseodymium or neodymium. 3. Documento de valor, impreso, según la reivindicación 1 ó 2, caracterizado porque la retícula principal tiene solamente una contaminación de metal de tierras raras.3. Value document, printed according to claim 1 or 2, characterized in that the main grid has only a rare earth metal contamination. 4. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 3, caracterizado porque la concentración de cromo se encuentra en una gama de 2 a 30 por ciento en peso, preferentemente de 5 a 15 por ciento en peso.4. Value document, printed, according to at least one of claims 1 to 3, characterized in that the chromium concentration is in a range of 2 to 30 percent by weight, preferably 5 to 15 percent by weight. 5. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 4, caracterizado porque el metal de tierras raras se encuentra presente en una concentración de 0,5 a 20 por ciento en peso, preferentemente de 0,8 a 13 por ciento en peso.5. Value document, printed, according to at least one of claims 1 to 4, characterized in that the rare earth metal is present in a concentration of 0.5 to 20 weight percent, preferably 0.8 to 13 weight percent 6. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 5, caracterizado porque la retícula principal tiene una estructura de granate o de perovsquita.6. Value document, printed, according to at least one of claims 1 to 5, characterized in that the main grid has a garnet or perovschite structure. 7. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 6, caracterizado porque la estructura de granate satisface la fórmula general7. Value document, printed, according to at least one of claims 1 to 6, characterized in that the garnet structure satisfies the general formula A_{3}Cr_{5-x}Al_{x}O_{12}A_ {3} Cr_ {5-x} Al_ {x} O_ {12} en la que A significa un elemento seleccionado del grupo que consiste en escandio, itrio, lantánidos y actínidos, y el índice x cumple la condición 0<x<4,99.in which A means a selected item from the group consisting of scandium, yttrium, lanthanides and actinides, and the index x meets the condition 0 <x <4.99. 8. Documento de valor, impreso, según la reivindicación 7, caracterizado porque el índice x cumple la condición 0,3<x<2,5, preferentemente 0,5<x<2.8. Value document, printed according to claim 7, characterized in that the index x meets the condition 0.3 <x <2.5, preferably 0.5 <x <2. 9. Documento de valor, impreso, según la reivindicación 7 u 8, caracterizado porque la substancia luminiscente satisface la fórmula9. Value document, printed according to claim 7 or 8, characterized in that the luminescent substance satisfies the formula Y_{3-z}Nd_{z}Cr_{5-x}Al_{x}O_{12}Y_ {3-z} Nd_ {z} Cr_ {5-x} Al_ {x} O_ {12} en la que z cumple la condición 0<z<1, preferentemente 0,02<z<0,1.where z meets the condition 0 <z <1, preferably 0.02 <z <0.1. 10. Documento de valor, impreso, según la reivindicación 7 u 8, caracterizado porque la substancia luminiscente satisface la fórmula10. Value document, printed according to claim 7 or 8, characterized in that the luminescent substance satisfies the formula Y_{3-z}Yb_{z}Cr_{5-x}Al_{x}O_{12}Y_ {3-z} Yb_ {z} Cr_ {5-x} Al_ {x} O_ {12} en la que z cumple la condición 0<z<1, preferentemente 0,05<z<0,3.where z meets the condition 0 <z <1, preferably 0.05 <z <0.3. 11. Documento de valor, impreso, según la reivindicación 7 u 8, caracterizado porque la substancia luminiscente satisface la fórmula11. Value document, printed according to claim 7 or 8, characterized in that the luminescent substance satisfies the formula Y_{3-z}Pr_{z}Cr_{5-x}Al_{x}O_{12}Y_ {3-z} Pr_ {z} Cr_ {5-x} Al_ {x} O_ {12} en la que z cumple la condición 0<z<1, preferentemente 0,01<z<0,5.where z meets the condition 0 <z <1, preferably 0.01 <z <0.5. 12. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 6, caracterizado porque la estructura de perovsquita satisface la fórmula general12. Value document, printed, according to at least one of claims 1 to 6, characterized in that the perovsquita structure satisfies the general formula ACrO_{3}ACrO 3 en la que A significa un elemento seleccionado del grupo que consiste en itrio, escandio y lantánidos.in which A means a selected item of the group consisting of yttrium, scandium and lanthanides 13. Documento de valor, impreso, según la reivindicación 12, caracterizado porque la substancia luminiscente satisface la fórmula general13. Value document, printed according to claim 12, characterized in that the luminescent substance satisfies the general formula Y_{1-z}Nd_{z}CrO_{3}Y_ {1-z} Nd_ {z} CrO_ {2} en el que el índice z cumple la condición 0<z<1, preferentemente 0,01<z<0,2.in which the z index meets the condition 0 <z <1, preferably 0.01 <z <0.2. 14. Documento de valor, impreso, según la reivindicación 12, caracterizado porque la substancia luminiscente satisface la fórmula general14. Value document, printed according to claim 12, characterized in that the luminescent substance satisfies the general formula Y_{1-z}Yb_{z}CrO_{3}Y_ {1-z} Yb_ {z} CrO_ {2} en el que el índice z cumple la condición 0<z<1, preferentemente 0,1<z<0,5.in which the z index meets the condition 0 <z <1, preferably 0.1 <z <0.5. 15. Documento de valor, impreso, según la reivindicación 12, caracterizado porque la substancia luminiscente satisface la fórmula general15. Value document, printed according to claim 12, characterized in that the luminescent substance satisfies the general formula Y_{1-z}Pr_{z}CrO_{3}Y_ {1-z} Pr_ {z} CrO_ {2} en el que el índice z cumple la condición 0<z<1, preferentemente 0,001<z<0,1.in which the z index meets the condition 0 <z <1, preferably 0.001 <z <0.1. 16. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 15, caracterizado porque la substancia luminiscente es mezclada con una tinta de impresión que contiene adicionalmente aditivos de color visibles visualmente.16. Value document, printed, according to at least one of claims 1 to 15, characterized in that the luminescent substance is mixed with a printing ink additionally containing visually visible color additives. 17. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 15, caracterizado porque la substancia luminiscente es mezclada en el volumen del documento de valor, que preferentemente consiste en papel.17. Value document, printed, according to at least one of claims 1 to 15, characterized in that the luminescent substance is mixed in the volume of the value document, which preferably consists of paper. 18. Documento de valor, impreso, según como mínimo una de las reivindicaciones 1 a 15, caracterizado porque la substancia luminiscente es dispuesta según un recubrimiento invisible y, como mínimo, parcial sobre el documento de valor.18. Value document, printed, according to at least one of claims 1 to 15, characterized in that the luminescent substance is arranged according to an invisible and at least partial coating on the value document. 19. Documento de valor, impreso, según la reivindicación 18, caracterizado porque el recubrimiento adopta forma de una franja.19. Value document, printed according to claim 18, characterized in that the coating takes the form of a strip. 20. Elemento de seguridad que tiene, como mínimo, un material de substrato y una substancia luminiscente basada en una retícula principal contaminada, como mínimo, con un metal de tierras raras que absorbe substancialmente en la región visible del espectro, es excitable en partes substanciales de la región visible del espectro y es, como mínimo, parcialmente transparente en la zona de longitud de onda, entre 0,8 micras y 1,1 micras, emitiendo el metal de tierras raras en la gama de longitud de onda entre 0,8 micras y 1,1 micras, y conteniendo la retícula principal cromo como substancia de absorción en una concentración tal que tiene lugar la amplificación de la emisión de la substancia luminiscente.20. Security element that has at least a substrate material and a luminescent substance based on a main grid contaminated at least with a ground metal rare that absorbs substantially in the visible region of the spectrum, is excitable in substantial parts of the visible region of the spectrum and is at least partially transparent in the area of wavelength, between 0.8 microns and 1.1 microns, emitting the rare earth metal in the wavelength range between 0.8 microns and 1.1 microns, and containing the main chromium lattice as absorption substance in a concentration such that the amplification of the emission of the luminescent substance. 21. Elemento de seguridad, según la reivindicación 20, caracterizado porque la substancia luminiscente está dispuesta dentro del volumen del material del substrato.21. Safety element according to claim 20, characterized in that the luminescent substance is disposed within the volume of the substrate material. 22. Elemento de seguridad, según la reivindicación 21, caracterizado porque la substancia luminiscente se encuentra presente en el material del substrato en una concentración comprendida entre 0,01 y 10 porciento en peso, preferentemente entre 0,1 y 5 porciento en peso.22. Safety element according to claim 21, characterized in that the luminescent substance is present in the substrate material in a concentration between 0.01 and 10 percent by weight, preferably between 0.1 and 5 percent by weight. 23. Elemento de seguridad, según la reivindicación 20, caracterizado porque la substancia luminiscente se encuentra presente en una capa aplicada al material del substrato.23. Safety element according to claim 20, characterized in that the luminescent substance is present in a layer applied to the substrate material. 24. Elemento de seguridad, según la reivindicación 23, caracterizado porque la substancia luminiscente se encuentra presente en una tinta de impresión en una concentración entre 0,5 y 40 porciento en peso, preferentemente entre 20 y 30 porciento en peso.24. Safety element according to claim 23, characterized in that the luminescent substance is present in a printing ink in a concentration between 0.5 and 40 percent by weight, preferably between 20 and 30 percent by weight. 25. Elemento de seguridad, según como mínimo una de las reivindicaciones 20 a 24, caracterizado porque el material del substrato consiste en plástico.25. Security element according to at least one of claims 20 to 24, characterized in that the substrate material consists of plastic. 26. Elemento de seguridad, según como mínimo una de las reivindicaciones 20 a 24, caracterizado porque el material del substrato consiste en papel.26. Security element according to at least one of claims 20 to 24, characterized in that the substrate material consists of paper. 27. Elemento de seguridad, según como mínimo una de las reivindicaciones 20 a 26, caracterizado porque el material del substrato está constituido en forma de hilo de seguridad, hilo moteado, plancheta o etiqueta.27. Security element according to at least one of claims 20 to 26, characterized in that the substrate material is constituted in the form of a security thread, mottled thread, tablet or label.
ES99910166T 1998-02-02 1999-01-29 PRINTED VALUE DOCUMENT, WITH A LUMINISCENT CHARACTERISTICS OF AUTHENTICITY IN THE FORM OF A MAIN RETICLE. Expired - Lifetime ES2201682T3 (en)

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RU2189908C2 (en) 2002-09-27
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US6344261B1 (en) 2002-02-05
CN1255895A (en) 2000-06-07
BR9904817A (en) 2000-05-23
BR9904790B1 (en) 2009-05-05
DK0975469T3 (en) 2003-09-29
AU2923299A (en) 1999-08-16
NO994740L (en) 1999-09-29
DE59906164D1 (en) 2003-08-07
WO1999038701A1 (en) 1999-08-05
DE19804021A1 (en) 1999-08-05
CN1128065C (en) 2003-11-19
EP0975469A1 (en) 2000-02-02
HK1027321A1 (en) 2001-01-12
EP0975469B1 (en) 2003-07-02
PT975469E (en) 2003-11-28
BR9904817B1 (en) 2009-05-05
BR9904790A (en) 2000-03-08

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